Insulating device



FIG. 1 is a front perspective view of an insulating device showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The dash-dot broken lines in the drawings illustrate boundaries of the claimed design. The dashed broken lines in the drawings illustrate portions of the insulating device that form no part of the claimed design. 

CLAIM The ornamental design for an insulating device, as shown and described. 